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10/25/2014 3:20 PM | |
Posts: 12 Rating: (0) |
Hi, i am beginner with a PLC Systems and i have a couple of questions about flow measuring with a CPU 314 IFM, i need to measure flow in the pipe with [url=http://docs-europe.electrocomponents.com/webdocs/001a/0900766b8001ae71.pdf] this sensor [/url] . This sensor gives a frequency output so i want to use CPU 314 IFM to measure that frequency because this CPU has special inputs that can measure frequency. I have read in -manual in the attachment- that i must use SFB 30 block to measure frequency. This block has possibilities (if i figured out it correctly) to set upper and lower comparison value for frequency so PLC can than for example light up a red bulb if the frequency is too high or too low. i don't need such features, i just need to read a frequency value from flow sensor, so these are my questions:
- do i have to set this upper and low values? - will SFB 30 give FREQ output if i dont do that ? - is there any simpler block to measure frequency with CPU 314 IFM? AttachmentS7314 IFM.pdf (107 Downloads) |
Last edited by: Min_Moderator at: 10/27/2014 11:37 AMUpload attachment |
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